Use-after-free in Linux kernel - CVE-2026-89801
Published: September 17, 2026
Vulnerability identifier: #VU150492
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89801
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise confidentiality, integrity, and availability.
The vulnerability exists due to a use-after-free in the OP_UNMAP_SPARSE arm of nouveau_uvmm_bind_job_submit() when handling failed sparse unmap operations. A local user can submit a sparse unmap operation to compromise confidentiality, integrity, and availability.
Affected software
Linux kernel
How to mitigate CVE-2026-89801
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/24c25b182d17d1bdfde0088c96bdf6f93e8f46bc
- https://git.kernel.org/stable/c/4083d24c2636fde7b18076115af52820d203bc57
- https://git.kernel.org/stable/c/88114e3a96582882e63b2f73aa7a5a9cf0d5073c
- https://git.kernel.org/stable/c/ba42d8a1c2c7629c61914df11a7d63ac77449ffb
- https://git.kernel.org/stable/c/ccf930812f23b8259ef64fd3394d53b093e4651a